NDLI: Microstrip differential passband filter with high common-mode suppression using periodically loaded stubs and coupled resonators

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Microstrip differential passband filter with high common-mode suppression using periodically loaded stubs and coupled resonators

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Microstrip differential passband filter with high common-mode suppression using periodically loaded stubs and coupled resonators

Content Provider	IET Digital Library
Author	Attar, Amir Joodaki, Mojtaba
Abstract	In this study, a periodic structure as a passband filter for differential input signals is introduced that suppresses the common-mode noise with a high common-mode rejection ratio on a wide range of frequencies. The unit cell of the periodic structure consists of open-ended stubs under common-mode and short-ended stubs under differential-mode excitation. The proposed design procedure introduced in this paper can be exploited for different microwave frequency bands while the overall shape of the filter remains unchanged. To verify the design approach, the authors designed and fabricated a filter at the centre frequency of 7 GHz on a Rogers RO4003 substrate with a dielectric constant of 3.7 and a loss tangent of 0.0027. Their studies show that for a three-unit-cell structure with the overall size of 18 mm × 40 mm (0.75λ g × 1.66λ g), a differential fractional bandwidth of 8.6% and a rejection ratio over 55 dB are achieved while the differential in band insertion loss is around 2 dB.
Starting Page	242
Ending Page	247
Page Count	6
Volume Number	2018
e-ISSN	20513305
Issue Number	Issue 4, Apr (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/joe/2018/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/joe.2017.0903
Journal	The Journal of Engineering
Publisher	The Institution of Engineering and Technology
Publisher Date	2018-02-12
Access Restriction	Open
Rights License	Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Subject Keyword	Band-pass Filter Centre Frequency Common-mode Noise Suppression Common-mode Rejection Ratio Coupled Resonator Design Procedure Differential Fractional Bandwidth Differential in Band Insertion Loss Differential Input Signal Differential-mode Excitation Electromagnetic Compatibility Frequency 7.0 GHz High Common-mode Suppression Interference Interference Suppression Microstrip Differential Passband Filter Microstrip Filter Microstrip Line Microwave Filter Microwave Frequency Band Microwave Resonator Open-ended Stubs Passive Filter Passive Network Periodic Structure Periodically Loaded Stubs Resonator Filter Rogers RO4003 Substrate Short-ended Stubs Three-unit-cell Structure Unit Cell Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article

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